164544156843691 has 2 divisors, whose sum is σ = 164544156843692. Its totient is φ = 164544156843690.

The previous prime is 164544156843611. The next prime is 164544156843697. The reversal of 164544156843691 is 196348651445461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164544156843691 - 2¹⁷ = 164544156712619 is a prime.

It is not a weakly prime, because it can be changed into another prime (164544156843697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82272078421845 + 82272078421846.

It is an arithmetic number, because the mean of its divisors is an integer number (82272078421846).

Almost surely, 2^{164544156843691} is an apocalyptic number.

164544156843691 is a deficient number, since it is larger than the sum of its proper divisors (1).

164544156843691 is an equidigital number, since it uses as much as digits as its factorization.

164544156843691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 298598400, while the sum is 67.

The spelling of 164544156843691 in words is "one hundred sixty-four trillion, five hundred forty-four billion, one hundred fifty-six million, eight hundred forty-three thousand, six hundred ninety-one".